The DOI matches its OpenAlex record; 42 of the 42 references it cites were found in a registry or an index.
Association between Recurrent Concussion and Late-Life Cognitive Impairment in Retired Professional Football Players
Abstract
OBJECTIVE: Cerebral concussion is common in collision sports such as football, yet the chronic neurological effects of recurrent concussion are not well understood. The purpose of our study was to investigate the association between previous head injury and the likelihood of developing mild cognitive impairment (MCI) and Alzheimer's disease in a unique group of retired professional football players with previous head injury exposure. METHODS: A general health questionnaire was completed by 2552 retired professional football players with an average age of 53.8 (+/-13.4) years and an average professional football playing career of 6.6 (+/- 3.6) years. A second questionnaire focusing on memory and issues related to MCI was then completed by a subset of 758 retired professional football players (> or = 50 yr of age). Results on MCI were then cross-tabulated with results from the original health questionnaire for this subset of older retirees. RESULTS: Of the former players, 61% sustained at least one concussion during their professional football career, and 24% sustained three or more concussions. Statistical analysis of the data identified an association between recurrent concussion and clinically diagnosed MCI (chi = 7.82, df = 2, P = 0.02) and self-reported significant memory impairments (chi = 19.75, df = 2, P = 0.001). Retired players with three or more reported concussions had a fivefold prevalence of MCI diagnosis and a threefold prevalence of reported significant memory problems compared with retirees without a history of concussion. Although there was not an association between recurrent concussion and Alzheimer's disease, we observed an earlier onset of Alzheimer's disease in the retirees than in the general American male population. CONCLUSION: Our findings suggest that the onset of dementia-related syndromes may be initiated by repetitive cerebral concussions in professional football players.
Overview
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Integrity signals
Registry
Cites
Statistics
Verification
Claims the paper makes
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
Citations
Cites
Current concepts in mild cognitive impairment
Petersen, R. C., Doody, R., Kurz, A., Mohs, R. C., Morris, J. C., Rabins, P. V., Ritchie, K., Rossor, M., Thal, L., & Winblad, B. (2001) · Archives of Neurology · doi:10.1001/archneur.58.12.1985 · Cited by 4,781
Petersen, R. C., Stevens, J. C., Ganguli, M., Tangalos, E. G., Cummings, J. L., & DeKosky, S. T. (2001) · Neurology · doi:10.1212/wnl.56.9.1133 · Cited by 2,065
Mild Cognitive Impairment Represents Early-Stage Alzheimer Disease
Morris, J. C., Storandt, M., Miller, J. P., McKeel, D. W., Price, J. L., Rubin, E. H., & Berg, L. (2001) · Archives of Neurology · doi:10.1001/archneur.58.3.397 · Cited by 1,851
Brookmeyer, R., Gray, S., & Kawas, C. (1998) · American Journal of Public Health · doi:10.2105/ajph.88.9.1337 · Cited by 1,787
Guskiewicz, K. M., McCrea, M., Marshall, S. W., Cantu, R. C., Randolph, C., Barr, W., Onate, J. A., & Kelly, J. P. (2003) · JAMA · doi:10.1001/jama.290.19.2549 · Cited by 1,712
Self-citationPrediction of AD with MRI-based hippocampal volume in mild cognitive impairment
Jack, C. R., Petersen, R. C., Xu, Y. C., O’Brien, P. C., Smith, G. E., Ivnik, R. J., Boeve, B. F., Waring, S. C., Tangalos, E. G., & Kokmen, E. (1999) · Neurology · doi:10.1212/wnl.52.7.1397 · Cited by 1,404
Epidemiology of Concussion in Collegiate and High School Football Players
Guskiewicz, K. M., Weaver, N. L., Padua, D. A., & Garrett, W. E. (2000) · The American Journal of Sports Medicine · doi:10.1177/03635465000280050401 · Cited by 851
Self-citationRates and risk factors for dementia and Alzheimer’s disease: Results from EURODEM pooled analyses
Launer, L. J., Andersen, K., Dewey, M. E., Letenneur, L., Ott, A., Amaducci, L. A., Brayne, C., Copeland, J. R. M., Dartigues, J.-F., Kragh-Sorensen, P., et al. (1999) · Neurology · doi:10.1212/wnl.52.1.78 · Cited by 758
Mayeux, R., Ottman, R., Maestre, G., Ngai, C., Tang, M.-X., Ginsberg, H., Chun, M., Tycko, B., & Shelanski, M. (1995) · Neurology · doi:10.1212/wnl.45.3.555 · Cited by 590
Tierney, M. C., Szalai, J. P., Snow, W. G., Fisher, R. H., Nores, A., Nadon, G., Dunn, E., & St. George-Hyslop, P. H. (1996) · Neurology · doi:10.1212/wnl.46.3.661 · Cited by 575
Research works printed but not linked: 4
- Mortimer, 1985, Head injury as risk factor for Alzheimer's disease., Neurology, 35, 264, 10.1212/WNL.35.2.264 · DOI · Paper page
- Roberts, 1990, The occult aftermath of boxing., J Neurol Neurosurg Psychiatry, 53, 373, 10.1136/jnnp.53.5.373 · DOI · Paper page
- Guskiewicz, 2003, Cumulative effects associated with recurrent concussion in collegiate football players. The NCAA Concussion Study., JAMA, 290, 2549, 10.1001/jama.290.19.2549 · DOI · Paper page
- Jordan, 1997, Apolipoprotein E epsilon4 associated with chronic traumatic brain injury in boxing., J Am Med Soc, 278, 136
Cited by
2016 Alzheimer's disease facts and figures
Alzheimer's Association (2016) · Alzheimer's & Dementia · doi:10.1016/j.jalz.2016.03.001 · Cited by 5,069
2013 Alzheimer's disease facts and figures
Alzheimer's Association, Thies, W., & Bleiler, L. (2013) · Alzheimer's & Dementia · doi:10.1016/j.jalz.2013.02.003 · Cited by 3,328
Traumatic brain injury: integrated approaches to improve prevention, clinical care, and research
Maas, A. I. R., Menon, D. K., Adelson, P. D., Andelic, N., Bell, M. J., Belli, A., Bragge, P., Brazinova, A., Büki, A., Chesnut, R. M., et al. (2017) · The Lancet Neurology · doi:10.1016/s1474-4422(17)30371-x · Cited by 2,609
McCrory, P., Meeuwisse, W. H., Aubry, M., Cantu, B., Dvořák, J., Echemendia, R. J., Engebretsen, L., Johnston, K., Kutcher, J. S., Raftery, M., et al. (2013) · British Journal of Sports Medicine · doi:10.1136/bjsports-2013-092313 · Cited by 2,580
Self-citation2018 Alzheimer's disease facts and figures
Alzheimer's Association (2018) · Alzheimer's & Dementia · doi:10.1016/j.jalz.2018.02.001 · Cited by 1,912
Metadata
- Authors
- Guskiewicz, K. M., Marshall, S. W., Bailes, J. E., McCrea, M., Cantu, R. C., RANDOLPH, C. C., & Jordan, B. D.
- Venue
- Neurosurgery
- Published
- 2005-10
- Volume
- 57
- Issue
- 4
- Pages
- 719-726
- ISSN
- 0148-396X (ISSN-L)
- OpenAlex
- W2105910930
- Cited by
- 1,196
- References
- 42
- FWCI
- 9.38
- Type
- journal article
- Language
- en
- Open access
- closed
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review
How to cite
Cite CoChat for the checks on this page, and the paper for its own findings.
- This page
- CoChat. (2026). Citation check: Association between Recurrent Concussion and Late-Life Cognitive Impairment in Retired Professional Football Players. https://app.cochat.ai/papers/10.1093/neurosurgery/57.4.719
- The paper
- Guskiewicz, K. M., Marshall, S. W., Bailes, J. E., McCrea, M., Cantu, R. C., RANDOLPH, C. C., & Jordan, B. D. (2005). Association between Recurrent Concussion and Late-Life Cognitive Impairment in Retired Professional Football Players. Neurosurgery. https://doi.org/10.1093/neurosurgery/57.4.719
Data sources
Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.